In-vehicle camera system

1. An in-vehicle camera system including a far camera and a near camera, both of which capture an image ahead of a vehicle, the in-vehicle camera system comprising: an electronic control unit configured to, during travel of the vehicle, determine whether an illumination of an image captured by the far camera is abnormal as a result of an illumination change ahead of the vehicle; and the electronic control unit being configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is abnormal, execute aperture control over the near camera, wherein the illumination of the image captured by the far camera is abnormal as the result of the illumination change ahead of the vehicle due to a blown out headlight or blocked up shadows.

2. The in-vehicle camera system according to claim 1 , wherein the electronic control unit being further configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is abnormal, determine whether the vehicle is placed at a preset aperture adjustment start timing based on a travel distance of the vehicle or an elapsed time, wherein the electronic control unit is configured to, when the electronic control unit determines that the vehicle is placed at the aperture adjustment start timing, start the aperture control over the near camera.

3. The in-vehicle camera system according to claim 1 , wherein the electronic control unit being further configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is abnormal, determine whether the illumination of the image captured by the far camera is normalized in course of travel of the vehicle, wherein the electronic control unit is configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is normalized, cancel the aperture control over the near camera.

4. An in-vehicle camera system including a far camera and a near camera, both of which capture an image ahead of a vehicle, the in-vehicle camera system comprising: an electronic control unit configured to, during travel of the vehicle, determine whether an illumination of an image captured by the far camera is abnormal as a result of an illumination change ahead of the vehicle; and the electronic control unit being configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is abnormal, execute aperture control over the near camera, wherein the electronic control unit being further configured to, when the electronic control unit determines that the illumination of the image captured by the far camera is abnormal, determine whether the vehicle is placed at a preset aperture adjustment start timing based on a travel distance of the vehicle or an elapsed time, wherein the electronic control unit is configured to, when the electronic control unit determines that the vehicle is placed at the aperture adjustment start timing, start the aperture control over the near camera.

5. A method for controlling an in-vehicle camera system including a far camera and a near camera, both of which capture an image ahead of a vehicle, the method comprising: determining, by an electronic control unit, whether an illumination of an image captured by the far camera is abnormal as a result of an illumination change ahead of the vehicle during travel of the vehicle; and in response to the electronic control unit determining that the illumination of the image captured by the far camera is abnormal, executing an aperture control over the near camera, wherein the electronic control unit is configured to adjust an aperture of the near camera in multiple levels based on a travel distance of the vehicle or an elapsed time as the aperture control over the near camera.

6. The method according to claim 5 further comprising: in response to the electronic control unit determining that the illumination of the image captured by the far camera is abnormal, determining whether the vehicle is placed at a preset aperture adjustment start timing based on a travel distance of the vehicle or an elapsed time; and in response to the electronic control unit determining that the vehicle is placed at the aperture adjustment start timing, starting the aperture control over the near camera.

7. The method according to claim 5 further comprising: in response to the electronic control unit determining that the illumination of the image captured by the far camera is abnormal, determining whether the illumination of the image captured by the far camera is normalized in course of travel of the vehicle; and in response to the electronic control unit determining that the illumination of the image captured by the far camera is normalized, canceling the aperture control over the near camera.